ceph/src/boost/libs/move/example/movable.hpp

   1 //////////////////////////////////////////////////////////////////////////////
   2 //
   3 // (C) Copyright Ion Gaztanaga 2009.
   4 // Distributed under the Boost Software License, Version 1.0.
   5 // (See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt)
   7 //
   8 // See http://www.boost.org/libs/move for documentation.
   9 //
  10 //////////////////////////////////////////////////////////////////////////////
  11 #ifndef BOOST_MOVE_TEST_MOVABLE_HPP
  12 #define BOOST_MOVE_TEST_MOVABLE_HPP
  13
  14 //[movable_definition
  15 //header file "movable.hpp"
  16 #include <boost/move/core.hpp>
  17 #include <boost/move/traits.hpp>
  18
  19 //A movable class
  20 class movable
  21 {
  22    BOOST_MOVABLE_BUT_NOT_COPYABLE(movable)
  23    int value_;
  24
  25    public:
  26    movable() : value_(1){}
  27
  28    //Move constructor and assignment
  29    movable(BOOST_RV_REF(movable) m)
  30    {  value_ = m.value_;   m.value_ = 0;  }
  31
  32    movable & operator=(BOOST_RV_REF(movable) m)
  33    {  value_ = m.value_;   m.value_ = 0;  return *this;  }
  34
  35    bool moved() const //Observer
  36    {  return !value_; }
  37
  38    int value() const //Observer
  39    {  return value_; }
  40 };
  41
  42 namespace boost{
  43
  44 template<>
  45 struct has_nothrow_move<movable>
  46 {
  47    static const bool value = true;
  48 };
  49
  50 }  //namespace boost{
  51 //]
  52
  53 #endif //BOOST_MOVE_TEST_MOVABLE_HPP